A measure of musical time, usually made up of two, three or four beats. Musical phrases and verses, in turn, are often made up of regular numbers of bars - four, eight or twelve, e.g. the four-bar melody which accompanies the phrase: "And now, the end is near, and so I face the final curtain." In a four-beat bar the first and third beats are normally accented in rock music, or the second and fourth in reggae. Think of dancing and it all makes sense -a waltz has three beats in the bar.